Sending failed:
Message sending failed since the following recipients were rejected by the server:[email protected] (The server responded: "<[email protected]>: Recipient address rejected: Relay access denied")
The message will stay in the 'outbox' folder until you either fix the problem (e.g. a broken address) or remove the message from the 'outbox' folder.
The following transport protocol was used:
PLANIMA

----------------------------------------------------------------
Sending failed:
Unknown error code 50
Your SMTP server does not support TLS. Disable TLS, if you want to connect without encryption.
Please send a full bug report at http://bugs.kde.org.
The message will stay in the 'outbox' folder until you either fix the problem (e.g. a broken address) or remove the message from the 'outbox' folder.
The following transport protocol was used:
PLANIMA
----------------------------------------------------------------

This is what I did:

Check what the server support click in KMAIL for receiving email from pop.planima.com.

Now receive this popup error message: ----------------------------------------------------------
Sending failed: Authentication failed.
Most likely the password is wrong.
The server responded: "Error: authentication failed" The message will stay in the 'outbox' folder until you either fix the problem (e.g. a broken address) or remove the message from the 'outbox' folder.
The following transport protocol was used: PLANIMA ----------------------------------------------------------

If I used PLAIN, got following error msg: ----------------------------------------------------------
Sending failed: Your SMTP server does not support PLAIN.
Choose a different authentication method.
The server responded: "Error: authentication failed" The message will stay in the 'outbox' folder until you either fix the problem (e.g. a broken address) or remove the message from the 'outbox' folder.
The following transport protocol was usedLANIMA ----------------------------------------------------------

Make sure you use the correct usernames. For the ISPConfig webmail package, you must use an email address as username, but for an email client like KMail, it's the real username (e.g. web1_someuser) that you must use.

Can you send emails eithout authentication? What's in /etc/postfix/main.cf?

------------------------------------------------------------
Sending failed:
Message sending failed since the following recipients were rejected by the server:[email protected] (The server responded: "<[email protected]>: Recipient address rejected: Relay access denied")
The message will stay in the 'outbox' folder until you either fix the problem (e.g. a broken address) or remove the message from the 'outbox' folder.
The following transport protocol was used:
PLANIMA

------------------------------------------------------------
There is a lot in /etc/postfix/main.cf (which part do you want to know?)

------------------------------------------------------------
Sending failed:
Message sending failed since the following recipients were rejected by the server:[email protected] (The server responded: "<[email protected]>: Recipient address rejected: Relay access denied")
The message will stay in the 'outbox' folder until you either fix the problem (e.g. a broken address) or remove the message from the 'outbox' folder.
The following transport protocol was used:
PLANIMA

------------------------------------------------------------

Click to expand...

Then your server is not an open relay which is good.

jaffaizal said:

There is a lot in /etc/postfix/main.cf (which part do you want to know?)

----------------------------------------------------------------
Retarted postfix, /etc/init.d/postfix restart
Sending to [email protected], still got the following message from the server: ------------------------------------------------------------------------
Sending failed: Authentication failed. Most likely the password is wrong. The server responded: "Error: authentication failed" The message will stay in the 'outbox' folder until you either fix the problem (e.g. a broken address) or remove the message from the 'outbox' folder. The following transport protocol was used: PLANIMA
------------------------------------------------------------------------
The password entered is correct. I know this because it is the same password for downloading email from my pop3 server. Also if sending from Uebimiau. It works.
So, what else could be wrong?

BTW, I can send to email to [email protected] without the "server requires authentication" selected. But the same error message as above if "server requires authentication" selected.

Sending failed:
Authentication failed.
Most likely the password is wrong.
The server responded: "Error: authentication failed"
The message will stay in the 'outbox' folder until you either fix the problem (e.g. a broken address) or remove the message from the 'outbox' folder.
The following transport protocol was used:
MILESWORK